Realistically, how often should power boards be replaced, especially with frequently used devices like PCs being involved? I've been using the same one for ~7 years and with a full workstation being replaced, I figure I'd also look into whether it might be worth changing out the board for a fresh one.

Considering pricing seems to all over the price from inexpensive to 10x the price and then some, I figure I'll also ask if a company like Belkin has any practical justification in charging a fair bit for an eight-way when compared to something that costs half as much, let alone a fraction of the price.